CN114645538B - Pile driving and connecting device in multistage telescopic pile - Google Patents
Pile driving and connecting device in multistage telescopic pile Download PDFInfo
- Publication number
- CN114645538B CN114645538B CN202210315818.7A CN202210315818A CN114645538B CN 114645538 B CN114645538 B CN 114645538B CN 202210315818 A CN202210315818 A CN 202210315818A CN 114645538 B CN114645538 B CN 114645538B
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- driving
- connecting plate
- pile
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- disc
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- 230000003014 reinforcing effect Effects 0.000 claims description 26
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
- E02D5/526—Connection means between pile segments
Abstract
The invention discloses a pile driving connection device in a multistage telescopic pile, which belongs to the technical field of overhead trestle, and comprises a joint mechanism, a driving mechanism and a fixing mechanism; the joint mechanism comprises a fixed seat, a plurality of support plates, a plurality of telescopic arms and a plurality of joint sliding blocks; the telescopic arm is connected with the joint sliding block; the joint sliding block is arranged on the fixed seat; the driving mechanism comprises a lifting oil cylinder, a fixed disc, a driving oil cylinder and a driving disc; the driving disc is provided with a plurality of driving sliding grooves for driving the telescopic arms; in pushing the fixing base to the inner pile through the lifting oil cylinder, the driving oil cylinder drives the disc shaft to move so as to enable the driving disc to rotate, and simultaneously drives a plurality of telescopic arms to stretch, a plurality of joint sliding blocks enter into cavities formed between the upper connecting plate and the lower connecting plate along the sliding rail, so that the problem that the size of the pile leg of the overhead trestle is limited to a certain extent when the existing transport ship is used, and the pile leg of the integral overhead trestle cannot meet the sea conveying requirement of the overhead trestle module is solved.
Description
Technical Field
The invention relates to a pile driving connection device in a multistage telescopic pile, and belongs to the technical field of overhead trestle.
Background
The offshore construction connection and connection unloading channel needs to span shallow water beach and wave breaking area, and the overhead trestle is an important component for constructing the connection and connection unloading channel; based on the cost-effectiveness ratio, the general trestle modules do not have the self-sailing capability, and other transportation ships are generally required to carry out the sea-crossing transportation on the current trestle modules, but the transportation ships have certain limitation on the size of the pile legs of the trestle, so that the integral trestle pile leg scheme cannot meet the sea-crossing transportation requirement of the trestle modules.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a multi-stage telescopic pile inner pile driving connecting device, and solves the problem that the existing transportation ship has a certain limit on the size of the pile leg of an overhead trestle, and the integral type pile leg of the overhead trestle cannot meet the sea-crossing transportation requirement of an overhead trestle module.
In order to achieve the above purpose/solve the above technical problems, the present invention is realized by adopting the following technical scheme: a pile driving connection device in a multistage telescopic pile comprises a joint mechanism, a driving mechanism and a fixing mechanism;
the joint mechanism comprises a fixed seat, a plurality of support plates, a plurality of telescopic arms and a plurality of joint sliding blocks; the plurality of support plates are fixedly connected with the fixing seat;
the number of the telescopic arms is the same as that of the joint sliding blocks, and the telescopic arms are connected with the joint sliding blocks;
the joint sliding block is arranged on the fixed seat and can move on the fixed seat under the drive of the telescopic arm;
the driving mechanism comprises a lifting oil cylinder, a fixed disc, a driving oil cylinder and a driving disc;
the output end of the lifting oil cylinder is connected with the fixed seat;
the fixed disc is fixedly connected with the supporting plate, and the driving oil cylinder is connected with the fixed disc; the driving disc is provided with a plurality of driving sliding grooves for driving the telescopic arms, and the driving sliding grooves are connected with the telescopic arms; the fixed disc is provided with a clamping groove, and a disc shaft for connecting the output end of the driving oil cylinder and the driving disc is arranged in the clamping groove;
the fixing structure comprises an upper connecting plate and a lower connecting plate;
the upper connecting plate is fixedly connected with the inner wall of the inner pile, and the lower connecting plate is fixedly connected with the inner wall of the inner pile; and a plurality of cavities for accommodating the joint sliding blocks are formed between the upper connecting plate and the lower connecting plate.
Optionally, the fixed seat is fixedly connected with a plurality of sliding rails, the number of the sliding rails corresponds to the number of the joint sliding blocks, the joint sliding blocks are in sliding connection with the sliding rails, the sliding rails are circumferentially distributed by taking the center of the fixed seat as the center of a circle, the intervals among the sliding rails are equal, and the sliding rails limit the joint sliding blocks, so that the joint sliding blocks can only slide along the sliding rails.
Optionally, a plurality of backup pad uses the center of fixing base to be the centre of a circle circumference distribution, and is single the backup pad sets up in two adjacent between the slide rail, can evenly share the gravity from the fixed disk.
Optionally, flexible arm includes driving arm, drive minor axis and driven arm, the one end and the fixing base of driving arm are articulated, and the other end and the driven arm of driving arm are articulated, the one end and the joint slider that the driven arm kept away from the driving arm are articulated, drive minor axis and driven arm rigid coupling, the drive minor axis is arranged in the drive spout, and when the drive dish rotated, the drive minor axis was under the drive of drive dish, and the flexible arm of drive is flexible.
Optionally, one surface of the lower connecting plate opposite to the upper connecting plate is provided with a plurality of joint vertical ribs, a plurality of joint vertical ribs are fixedly connected with the upper connecting plate, a plurality of cavities are formed between the upper connecting plate and the lower connecting plate, and the number of the cavities is equal to that of the joint sliding blocks.
Optionally, a plurality of first reinforcing rib plates for increasing the connection strength are arranged on the surface of the upper connecting plate, which is opposite to the lower connecting plate, and the first reinforcing rib plates are fixedly connected with the side inner walls of the inner piles.
Optionally, the plurality of first reinforcing ribs are circumferentially distributed with the center of the connecting plate as the center of the circle, and the distances between two adjacent first reinforcing ribs are the same.
Optionally, a plurality of second reinforcing rib plates for increasing the connection strength are arranged on the surface of the lower connecting plate, which is opposite to the upper connecting plate, and the second reinforcing rib plates are fixedly connected with the side inner walls of the inner piles.
Optionally, the second reinforcing ribs are circumferentially distributed with the center of the lower connecting plate as the center of a circle, and the distances between two adjacent second reinforcing ribs are the same.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the fixing mechanism is arranged in the inner pile, the fixing seat in the joint mechanism is pushed into the inner pile through the lifting oil cylinder in the driving mechanism, so that the cavity formed between the upper connecting plate and the lower connecting plate is aligned with the joint sliding block, the driving oil cylinder is started, the driving oil cylinder drives the disc shaft to move so as to enable the driving disc to rotate, the driving disc drives the telescopic arms to extend when rotating, and finally, the plurality of joint sliding blocks enter the cavity formed between the upper connecting plate and the lower connecting plate along the sliding rail under the pushing of the telescopic arms, so that the connection with the inner pile is completed, the inner pile and the joint mechanism can stretch together under the driving of the telescopic oil cylinder, the joint mechanism is not connected with the inner pile when the inner pile is required to be transported in a sea, and the problem that the current transportation ship has a certain limit on the size of the pile leg of the trestle is solved, and the pile leg of the trestle of the integral trestle cannot meet the sea transportation requirement of the trestle module.
2. The invention improves the connection strength of the fixing mechanism and reduces the risk that the fixing mechanism is separated from the inner pile when the lifting cylinder drives the inner pile to stretch out and draw back after the jointing mechanism is connected with the fixing mechanism by arranging the reinforced rib plates on the upper connecting plate and the lower connecting plate which are connected with the inner pile.
Drawings
Fig. 1 is an overall schematic diagram of a pile driving connection device in a multi-stage telescopic pile according to an embodiment of the present invention;
FIG. 2 is a front view of an engagement mechanism of a multi-stage telescopic pile-in-pile drive coupling provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of a driving mechanism of a pile driving connection device in a multi-stage telescopic pile according to an embodiment of the present invention (a fixing disc, a driving cylinder and a clamping groove are shown in the figure);
fig. 4 is a schematic diagram of a driving mechanism of a pile driving connection device in a multi-stage telescopic pile according to an embodiment of the present invention (a driving disc, a driving chute and a disc shaft are shown in the figure);
FIG. 5 is a front view of a fixing mechanism of a pile-in-pile driving connection device for a multi-stage telescopic pile according to an embodiment of the present invention;
FIG. 6 is a schematic view of a fixing mechanism of a pile driving connection device in a multi-stage telescopic pile according to an embodiment of the present invention (the upper connection plate and the first reinforcement rib are shown in the drawing);
FIG. 7 is a schematic view of a fixing mechanism of a pile driving connection device in a multi-stage telescopic pile according to an embodiment of the present invention (the lower connection plate, the joint vertical rib and the second reinforcement rib are shown in the drawings);
FIG. 8 is a schematic diagram of a multi-stage telescopic pile-in-pile driving connection device according to an embodiment of the present invention after connection with a pile;
fig. 9 is a schematic diagram of a multi-stage telescopic pile driving connection device according to an embodiment of the present invention after the connection between the multi-stage telescopic pile driving connection device and the pile is removed.
In the figure: 1. an engagement mechanism; 101. a fixing seat; 102. a support plate; 103. a telescoping arm; 1031. a drive arm; 1032. driving the short shaft; 1033. a driven arm; 104. a joint slider; 105. a slide rail; 2. a driving mechanism; 201. a lifting oil cylinder; 202. a fixed plate; 203. a driving oil cylinder; 204. a drive plate; 205. driving the chute; 206. a disc shaft; 207. a clamping groove; 3. a fixing mechanism; 301. an upper connecting plate; 302. a lower connecting plate; 303. a joint vertical rib; 304. a first reinforcing rib; 305. a second reinforcing rib; 4. an inner pile; 5. a cavity.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Examples
As shown in fig. 1 and 2, a multi-stage telescopic pile inner pile driving connecting device comprises a joint mechanism 1, a driving mechanism 2 and a fixing mechanism 3; the joint mechanism 1 comprises a fixed seat 101, a plurality of support plates 102, a plurality of telescopic arms 103 and a plurality of joint sliders 104; specifically, in the present embodiment, the number of joint sliders 104 is six, and thus the number of telescopic arms 103 is six; the telescopic arm 103 comprises a driving arm 1031, a driving short shaft 1032 and a driven arm 1033, one end of the driving arm 1031 is hinged with the top of the fixed seat 101, the other end of the driving arm 1031 is hinged with the bottom of the driven arm 1033, one end of the driven arm 1033, which is far away from the driving arm 1031, is hinged with the bottom of the joint slider 104, and the driving short shaft 1032 is fixedly connected with the top of the driven arm 1033; the top of the fixing seat 101 is fixedly connected with a plurality of sliding rails 105, and specifically, the number of the sliding rails 105 corresponds to the number of the joint sliding blocks 104, and the number of the sliding rails is six; the joint sliding blocks 104 are in sliding connection with the sliding rails 105, the sliding rails 105 are circumferentially distributed by taking the center of the fixing seat 101 as the center of a circle, and the intervals among the sliding rails 105 are equal; the sliding rail 105 limits the joint sliding block 104, so that the joint sliding block 104 can only slide along the sliding rail 105, and when the telescopic arm 103 stretches, the driven arm 1033 pushes the joint sliding block 104 to slide along the sliding rail 105 towards a direction away from the circle center of the fixed seat 101; the number of the support plates 102 is six, the support plates 102 are circumferentially distributed by taking the center of the fixed seat 101 as the center of a circle, and a single support plate 102 is arranged between two adjacent slide rails 105;
as shown in fig. 3 and 4, the drive mechanism 2 includes a lift cylinder 201, a fixed disk 202, a drive cylinder 203, and a drive disk 204; the end face of the cylinder body of the lifting cylinder 201 is fixedly connected with the bottom face of the fixed seat 101; the bottom of the fixed disk 202 is fixedly connected with the tops of the six support plates 102; the driving oil cylinder 203 is hinged with the top of the fixed disc 202; the driving disc 204 is capable of being transported and arranged below the fixed disc 202, specifically, a plurality of driving sliding grooves 205 are formed in the driving disc 204, the driving sliding grooves 205 are used for driving the telescopic arms 103 through driving short shafts 1032, the number of the driving sliding grooves 205 is six as same as that of the telescopic arms 103, the division positions of the driving sliding grooves 205 on the driving disc 204 are the same as those of the driving short shafts 1032 in the telescopic arms 103, the driving short shafts 1032 are sleeved in the driving sliding grooves 205, and the driving short shafts 1032 are in sliding connection with the driving sliding grooves 205; the fixed disc 202 is provided with a clamping groove 207, the clamping groove 207 penetrates through the top and the bottom of the fixed disc 202, a disc shaft 206 is arranged in the clamping groove 207, the size of the clamping groove 207 is matched with the movement track of the disc shaft 206, the clamping groove 207 extends out of the upper end and the lower end of the disc shaft 206, the disc shaft 206 is in sliding contact with the clamping groove 207, the top end of the disc shaft 206 is hinged with the output end of the driving oil cylinder 203, and the bottom end of the disc shaft 206 is fixedly connected with the top of the driving disc 204; driven by the driving oil cylinder 203, the disc shaft 206 drives the driving disc 204 to rotate, and the driving disc 204 drives the driven arm 1033 to move through the driving short shaft 1032 while rotating, so that the sliding of the joint slider 104 is realized;
as shown in fig. 5, 8 and 9, the fixing structure includes an upper connection plate 301 and a lower connection plate 302; the upper connecting plate 301 and the lower connecting plate 302 are both positioned in the inner pile 4, the upper connecting plate 301 is fixedly connected with the side inner wall of the inner pile 4, and the lower connecting plate 302 is fixedly connected with the side inner wall of the inner pile 4; the upper connecting plate 301 is located at the top of the lower connecting plate 302, a plurality of cavities 5 are formed between the upper connecting plate 301 and the lower connecting plate, specifically, the top of the lower connecting plate 302 is fixedly connected with a plurality of joint vertical ribs 303, the number of the joint vertical ribs 303 is six, a spacing area is arranged between two adjacent joint vertical ribs 303, the top of the joint vertical ribs 303 is fixedly connected with the bottom of the upper connecting plate 301, six cavities 5 are formed between the upper connecting plate 301 and the lower connecting plate 302, and the cavities 5 are used for accommodating joint sliding blocks 104; starting a lifting oil cylinder 201, pushing a fixed seat 101 into an inner pile 4 by the lifting oil cylinder 201, aligning a cavity 5 formed between an upper connecting plate 301 and a lower connecting plate 302 with a joint sliding block 104, starting a driving oil cylinder 203 again, extending the output end of the driving oil cylinder 203, driving a driving disc 204 to rotate, and enabling the joint sliding block 104 to start sliding and finally enter the cavity 5 between the upper connecting plate 301 and the lower connecting plate 302, so that the connection between a joint mechanism 1 and the inner pile 4 is realized;
as shown in fig. 6 and 7, the top of the upper connecting plate 301 is provided with a plurality of first reinforcing ribs 304, specifically, twelve first reinforcing ribs 304 are circumferentially distributed with the center of the upper connecting plate 301 as the center, and the distances between two adjacent first reinforcing ribs 304 are the same, and the first reinforcing ribs 304 are fixedly connected with the side inner walls of the inner piles 4; the bottom of the lower connecting plate 302 is provided with a plurality of second reinforcing rib plates 305, specifically, twelve second reinforcing rib plates 305 are arranged, the second reinforcing rib plates 305 and the center of the lower connecting plate 302 are circumferentially distributed by taking the center as the circle center, the distances between two adjacent second reinforcing rib plates 305 are the same, and the second reinforcing rib plates 305 are fixedly connected with the side inner walls of the inner piles 4; by arranging the reinforcing ribs on the upper connecting plate 301 and the lower connecting plate 302 which are connected with the inner pile 4, the connection strength of the fixing mechanism 3 is improved, and the risk that the fixing mechanism 3 is separated from the inner pile 4 when the lifting cylinder 201 drives the inner pile 4 to stretch and retract after the joint mechanism 1 is connected with the fixing mechanism 3 is reduced.
Principle of operation
The lifting oil cylinder 201 in the driving mechanism 2 pushes the fixing seat 101 in the jointing mechanism 1 into the inner pile 4, so that a cavity 5 formed between the upper connecting plate 301 and the lower connecting plate 302 is aligned with the joint sliding block 104, the driving oil cylinder 203 is started, the output end of the driving oil cylinder 203 extends, the disc shaft 206 moves to further enable the driving disc 204 to rotate, the driving disc 204 rotates and drives the plurality of telescopic arms 103 to extend, and finally, under the pushing of the telescopic arms 103, the plurality of joint sliding blocks 104 enter the cavity 5 formed between the upper connecting plate 301 and the lower connecting plate 302 along the sliding rail 105, and the connection with the inner pile 4 is completed; when the connection needs to be released, the output end of the driving oil cylinder 203 contracts, the disc shaft 206 drives the driving disc 204 to rotate reversely, the telescopic arm 103 is changed from an extension state to a contraction state, and the joint slider 104 is pulled to reset.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (7)
1. The driving and connecting device for the multi-stage telescopic pile is characterized by comprising a joint mechanism, a driving mechanism and a fixing mechanism;
the joint mechanism comprises a fixed seat, a plurality of support plates, a plurality of telescopic arms and a plurality of joint sliding blocks; the plurality of support plates are fixedly connected with the fixing seat;
the number of the telescopic arms is the same as that of the joint sliding blocks, and the telescopic arms are connected with the joint sliding blocks;
the connector sliding blocks are arranged on the fixing base, a plurality of sliding rails are fixedly connected on the fixing base, the number of the sliding rails corresponds to the number of the connector sliding blocks, the connector sliding blocks are in sliding connection with the sliding rails, the sliding rails are circumferentially distributed by taking the center of the fixing base as the center of a circle, the intervals among the sliding rails are equal, and the connector sliding blocks can move on the fixing base under the driving of the telescopic arms;
the telescopic arm comprises a driving arm, a driving short shaft and a driven arm, one end of the driving arm is hinged with the fixed seat, the other end of the driving arm is hinged with the driven arm, one end of the driven arm, which is far away from the driving arm, is hinged with the joint sliding block, the driving short shaft is fixedly connected with the driven arm, the driving short shaft is positioned in the driving sliding groove, and when the driving disc rotates, the driving short shaft is driven by the driving disc to drive the telescopic arm to stretch;
the driving mechanism comprises a lifting oil cylinder, a fixed disc, a driving oil cylinder and a driving disc;
the output end of the lifting oil cylinder is connected with the fixed seat;
the fixed disc is fixedly connected with the supporting plate, and the driving oil cylinder is connected with the fixed disc; the driving disc is provided with a plurality of driving sliding grooves for driving the telescopic arms, and the driving sliding grooves are connected with the telescopic arms; the fixed disc is provided with a clamping groove, and a disc shaft for respectively connecting the output end of the driving oil cylinder and the driving disc is arranged in the clamping groove;
the fixing mechanism comprises an upper connecting plate and a lower connecting plate;
the upper connecting plate is fixedly connected with the inner wall of the inner pile, and the lower connecting plate is fixedly connected with the inner wall of the inner pile; and a plurality of cavities for accommodating the joint sliding blocks are formed between the upper connecting plate and the lower connecting plate.
2. The multi-stage telescopic pile driving connection device according to claim 1, wherein a plurality of support plates are circumferentially distributed with the center of the fixing base as the center of a circle, and a single support plate is arranged between two adjacent slide rails.
3. The multi-stage telescopic pile driving connection device according to claim 1, wherein a plurality of joint vertical ribs are arranged on the surface, opposite to the upper connecting plate, of the lower connecting plate, the joint vertical ribs are fixedly connected with the upper connecting plate, a plurality of cavities are formed between the upper connecting plate and the lower connecting plate, and the number of the cavities is equal to that of the joint sliding blocks.
4. The driving connection device for the multi-stage telescopic pile inner piles according to claim 1, wherein a plurality of first reinforcing rib plates for increasing the connection strength are arranged on the surface of the upper connecting plate, which is opposite to the lower connecting plate, and the first reinforcing rib plates are fixedly connected with the side inner walls of the inner piles.
5. The driving connection device for the multi-stage telescopic pile according to claim 4, wherein the plurality of first reinforcing ribs are circumferentially distributed with the center of the connecting plate as the center of the circle, and the distances between two adjacent first reinforcing ribs are the same.
6. The driving connection device for the multi-stage telescopic pile inner piles according to claim 1, wherein a plurality of second reinforcing rib plates for increasing the connection strength are arranged on the surface of the lower connecting plate opposite to the upper connecting plate, and the second reinforcing rib plates are fixedly connected with the side inner walls of the inner piles.
7. The driving connection device for multi-stage telescopic piles according to claim 6, wherein the second reinforcement ribs are circumferentially distributed with the center of the lower connection plate as the center of the circle, and the distances between the adjacent second reinforcement ribs are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210315818.7A CN114645538B (en) | 2022-03-29 | 2022-03-29 | Pile driving and connecting device in multistage telescopic pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210315818.7A CN114645538B (en) | 2022-03-29 | 2022-03-29 | Pile driving and connecting device in multistage telescopic pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114645538A CN114645538A (en) | 2022-06-21 |
| CN114645538B true CN114645538B (en) | 2023-09-15 |
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| CN202210315818.7A Active CN114645538B (en) | 2022-03-29 | 2022-03-29 | Pile driving and connecting device in multistage telescopic pile |
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| CN (1) | CN114645538B (en) |
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| CN114645538A (en) | 2022-06-21 |
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